CN114890499B - Plasma activated water preparation device - Google Patents
Plasma activated water preparation device Download PDFInfo
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- CN114890499B CN114890499B CN202210634345.7A CN202210634345A CN114890499B CN 114890499 B CN114890499 B CN 114890499B CN 202210634345 A CN202210634345 A CN 202210634345A CN 114890499 B CN114890499 B CN 114890499B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
本申请涉及一种等离子体活化水制备装置，其具体包括气相放电组件100、气液混相放电组件以及容器，容器内盛放有待处理溶液，气相放电组件100电离空气，产生空气等离子体，这些空气等离子体传输至待处理溶液，逐步溶解到待处理溶液中，在待处理溶液中生成H+、NO2 ‑和NO3 ‑；气液混相放电组件在气液交界面发生电离，此时会在气液交界面的液体中产生大量的H2O2。整个过程中，通过气相放电和气液混相放电的组合的方案同时产生大量的气体等离子(包括H+、NO2 ‑和NO3 ‑等)和大量的H2O2，可以显著提升等离子体活化水制备效率。
The present application relates to a plasma activated water preparation device, which specifically includes a gas phase discharge component 100, a gas-liquid mixed phase discharge component and a container. The container contains a solution to be treated. The gas phase discharge component 100 ionizes the air to generate air plasma, which is transmitted to the solution to be treated and gradually dissolved into the solution to be treated, generating H + , NO 2 ‑ and NO 3 ‑ in the solution to be treated; the gas-liquid mixed phase discharge component is ionized at the gas-liquid interface, and a large amount of H 2 O 2 is generated in the liquid at the gas-liquid interface. In the whole process, a large amount of gas plasma (including H + , NO 2 ‑ and NO 3 ‑, etc.) and a large amount of H 2 O 2 are simultaneously generated by the combination of gas phase discharge and gas-liquid mixed phase discharge, which can significantly improve the efficiency of plasma activated water preparation.
Description
Technical Field
The application relates to the technical field of activated water preparation, in particular to a plasma activated water preparation device.
Background
Plasma activated water (PLASMA ACTIVATED WATER, PAW) is a generic term for distilled water, normal saline, and tap water that have been plasma treated. In the process of interaction of the liquids, on one hand, products such as O3, NO2 and the like generated in the self-discharge process are directly diffused and dissolved in water to generate stable particles such as H +、NO2 -、NO3 - and the like, and on the other hand, water molecules also participate in the discharge reaction to generate short-service-life strong-oxidizing free radicals such as OH and finally convert into H 2O2. The oxidative particles in the PAW can further react to generate strong oxidative substances such as ONOOH, so that the PAW has a strong application prospect in the sterilization and disinfection field.
The higher the concentrations of three particles H +、NO2 - and H 2O2 in PAW on the surface, the better the PAW sterilization effect, so that the improvement of the concentrations of the three particles in PAW is the key for improving the PAW sterilization effect. Most of the existing PAW preparation devices utilize Dielectric Barrier Discharge (DBD) in a dielectric tube form to discharge in air to generate plasma, and then the discharged product is introduced into water by an air suction piece. In order to improve the efficiency of PAW production, many have proposed the use of multiple tube discharge arrays.
However, the mode of adopting the multitube array in the air can improve the concentration of H +、NO2 - in PAW, but the effect of increasing the concentration of H 2O2 is very limited, the prepared PAW is mainly dependent on an acidic environment, the sterilization effect is limited, the preparation efficiency of the traditional PAW is relatively low, and the current market demand is difficult to meet.
Disclosure of Invention
Based on this, it is necessary to provide a plasma activated water preparation apparatus for efficient preparation, aiming at the problem that the conventional plasma activated water preparation cannot efficiently prepare the plasma activated water.
The plasma activated water preparation device comprises a gas phase discharge assembly, a gas-liquid mixed phase discharge assembly and a container, wherein the container is used for containing a solution to be treated; the gas-liquid mixed phase discharge assembly and the solution to be treated form a gas-liquid interface;
the gas phase discharge assembly ionizes air to generate air plasma, and the air plasma is transmitted to the solution to be treated; and the gas-liquid mixed phase discharge assembly is ionized at the gas-liquid interface.
In one embodiment, the gas phase discharge assembly comprises an air extraction piece, an insulating medium container and an electrode, wherein the insulating medium container is provided with an ionized gas outlet and an ionized gas inlet;
the electrode is inserted into the insulating medium container, the air inlet end of the air extraction piece is connected with the atmosphere, the air outlet end of the air extraction piece is connected with the air inlet of the insulating medium container, the electrode ionizes air to generate air plasma, and the air plasma is transmitted to the solution to be treated through the ionized air outlet.
In one embodiment, the gas phase discharge assembly further comprises a first drive power source, the first drive power source being connected to the electrode.
In one embodiment, the gas phase discharge assembly further comprises a first porous bubble member disposed at the ionized gas outlet of the insulating medium container.
In one embodiment, the gas-liquid mixed phase discharge assembly comprises an insulating part and an electrode array, wherein the electrode array is arranged on the insulating part, forms a gas-liquid interface with the solution to be treated, and is ionized at the gas-liquid interface.
In one embodiment, the gas-liquid mixed phase discharge assembly further comprises a second driving power source, and the second driving power source is connected with the electrode array.
In one embodiment, the gas-liquid mixed phase discharge assembly comprises a pumping piece, a gas-liquid mixed phase ionization tank and a high-voltage electrode;
the water inlet of the water pumping piece is connected with the container, the water outlet of the water pumping assembly is connected with the gas-liquid mixed phase ionization groove, and the gas-liquid mixed phase ionization groove is provided with a water outlet;
The pumping assembly pumps the solution to be treated in the container to the gas-liquid mixed phase ionization tank, the high-voltage electrode and the solution to be treated in the gas-liquid mixed phase ionization tank form a gas-liquid interface, the high-voltage electrode ionizes at the gas-liquid interface, and the ionized solution flows back to the container through the water outlet of the gas-liquid mixed phase ionization tank.
In one embodiment, the plasma activated water preparation device further comprises a container cover, a vent pipe and a baffle plate, wherein a first air outlet and a second air outlet are formed in the container cover, one end of the baffle plate is connected with the container cover, the other end of the baffle plate is inserted into the container and is in contact with the solution to be treated, the first air outlet and the second air outlet are respectively arranged on two sides of the baffle plate, the first air outlet is positioned on one side close to the gas-liquid mixed phase discharge assembly, and the second air outlet is positioned on one side far away from the gas-liquid mixed phase discharge assembly; one end of the vent pipe is connected with the first air outlet, and the other end of the vent pipe is inserted into the solution to be treated.
In one embodiment, the plasma activated water preparation device further comprises a second porous bubble member, and the second porous bubble member is connected with one end of the vent pipe inserted into the solution to be treated.
In one embodiment, the plasma activated water preparation device further comprises a ground electrode, wherein the ground electrode is arranged at the bottom of the container.
The plasma activated water preparation device comprises a gas phase discharge assembly, a gas-liquid mixed phase discharge assembly and a container, wherein a solution to be treated is contained in the container, the gas phase discharge assembly ionizes air to generate air plasmas, the air plasmas are transmitted to the solution to be treated and gradually dissolved into the solution to be treated, and H +、NO2 - and NO 3 - are generated in the solution to be treated; the gas-liquid mixed phase discharge assembly is ionized at the gas-liquid interface, and a large amount of H 2O2 is generated in the liquid at the gas-liquid interface. In the whole process, a large amount of gas plasmas (including H +、NO2 -, NO 3 - and the like) and a large amount of H 2O2 are simultaneously generated by a scheme of combining gas phase discharge and gas-liquid mixed phase discharge, so that the preparation efficiency of the plasma activated water can be remarkably improved.
Drawings
FIG. 1 is a schematic block diagram of a plasma activated water production apparatus in one embodiment;
FIG. 2 is a schematic structural view of a plasma activated water production apparatus in one embodiment;
FIG. 3 is a schematic diagram of a gas-liquid mixed phase discharge assembly according to an embodiment;
FIG. 4 is a schematic structural view of a plasma activated water production apparatus in one example of application;
fig. 5 is a schematic structural view of a plasma activated water production apparatus in another application example.
Reference numerals in the specific embodiments are as follows:
a gas phase discharge assembly 100, a gas-liquid mixed phase discharge assembly 200, and a container 300;
The device comprises a solution A to be treated, an air pumping piece 120, an insulating medium container 140, an electrode 160, a first driving power supply 170, a first porous bubble piece 180, an insulating piece 220, an electrode array 240, a water pumping piece 250, a gas-liquid mixed phase ionization groove 260, a high-voltage electrode 270, a second driving power supply 280, a container cover 400, a vent pipe 500 and a baffle piece 600;
The device comprises a first driving power supply 1, a second driving power supply 2, an air pump 3, a medium pipe 4, a high-voltage rod electrode 5, a high-voltage insulating plate 6, a metal needle electrode array 7, a first air outlet 8, a second air outlet 9, a bubble disk 10, a bubble stone 11, a baffle 12, a container 13, a solution 14 to be treated, a first air plasma 15, a second part of air plasma 16, a medium wrapping ground electrode 17, a water suction pump 18, a gas-liquid mixed phase ionization groove 19, a high-voltage rod electrode 20 and an insulating medium 21.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
As shown in fig. 1, the plasma activated water preparation device of the present application comprises a gas phase discharge assembly 100, a gas-liquid mixed phase discharge assembly 200, and a container 300, wherein the container 300 is used for containing a solution a to be treated; the gas-liquid mixed phase discharge assembly 200 forms a gas-liquid interface with the solution A to be treated; the gas phase discharge assembly 100 ionizes air to generate air plasma, and the air plasma is transmitted to the solution A to be treated; the gas-liquid mixed phase discharge assembly 200 ionizes at the gas-liquid interface.
The container 300 is used for holding a solution a to be treated. The shape, size, etc. of the container 300 may be set according to the actual situation, and the container 300 may be made of an insulating material, such as glass, ceramic, etc. Further, the container 300 may include a container cover 400 such that the ionized air plasma may remain in the container 300 for a longer period of time, thereby being further sufficiently dissolved into the solution a to be treated. The solution A to be treated is specifically an aqueous solution, and H +、NO2 - and NO 3 - are generated by dissolution of air plasma after the air plasma enters the aqueous solution. Further, an insulating medium-wrapped ground electrode may be provided at the bottom of the container 300.
The gas phase discharge assembly 100 is used to ionize air, particularly by high voltage electricity. Specifically, high voltage electricity can be applied to a high voltage rod electrode placed in the air, and the high voltage rod electrode breaks down the surrounding air to generate air plasma. At the same time as the discharge, O 3, NO and NO 2 enter the solution a to be treated by the gas flow, and these gases and air plasma generate H +、NO2 - and NO 3 - in the solution a to be treated.
The gas-liquid mixed phase discharging assembly 200 forms a gas-liquid interface with the solution a to be treated, and the gas-liquid interface refers to an interface of air and liquid (the solution a to be treated), and can be simply understood as a contact interface of air and liquid. In practical applications, the gas-liquid mixed phase discharging assembly 200 may be very close to the solution a to be treated, but not directly contacted with the solution a to be treated, i.e. there is a very small gap between the gas-liquid mixed phase discharging assembly 200 and the solution a to be treated. The gas-liquid mixed phase discharge assembly 200 ionizes at the gas-liquid interface, that is, ionized air generates a large amount of air plasma, which is accumulated in the gas-liquid interface region (region between the gas-liquid mixed phase discharge assembly 200 and the solution a to be treated), and a large amount of H 2O2 is generated in the solution a to be treated at the gas-liquid interface while discharging. Further, the gas-liquid mixed phase discharge assembly 200 may include a discharge electrode array, where a plurality of electrodes are combined to form the electrode array, for example, a plurality of metal needle electrodes may form the metal needle electrode array, and since the electrode array includes a plurality of electrodes, the plurality of electrodes generate ionization reactions at the same time, so that ionization efficiency can be improved, and a large amount of air plasma can be released by ionization in a short time.
The plasma activated water preparation device comprises a gas phase discharge assembly 100, a gas-liquid mixed phase discharge assembly 200 and a container 300, wherein a solution A to be treated is contained in the container 300, the gas phase discharge assembly 100 ionizes air to generate air plasmas, the air plasmas are transmitted to the solution A to be treated and gradually dissolved into the solution A to be treated, and H +、NO2 - and NO 3 - are generated in the solution A to be treated; the gas-liquid mixed phase discharge assembly 200 ionizes at the gas-liquid interface, which generates a large amount of H 2O2 in the liquid at the gas-liquid interface. In the whole process, a large amount of gas plasmas (including H +、NO2 -, NO 3 - and the like) and a large amount of H 2O2 are simultaneously generated by a scheme of combining gas phase discharge and gas-liquid mixed phase discharge, so that the preparation efficiency of the plasma activated water can be remarkably improved.
As shown in fig. 2, in one embodiment, the gas phase discharge assembly 100 includes a gas extraction member 120, an insulating medium container 140, and an electrode 160, wherein the insulating medium container 140 is provided with an ionized gas outlet and inlet; the electrode is inserted into the insulating medium container 140, the air inlet end of the air extracting member 120 is connected with the atmosphere, the air outlet end of the air extracting member 120 is connected with the air inlet of the insulating medium container 140, the electrode ionizes air to generate air plasma, and the air plasma is transmitted to the solution A to be treated through the ionized air outlet of the insulating medium container 140.
The air extracting member 120 is used for extracting air into the insulating medium container 140, and the air extracting member 120 may be an air pump, which may be an electric air pump or a manual air pump, for extracting air from the outside into the insulating medium container 140. The insulating medium container 140 is a container 300 made of an insulating material, for example, quartz glass or ceramic, which may be a quartz glass tube or ceramic tube in particular; the insulating medium container 140 is used for providing a high-voltage ionization place, the insulating medium container 140 is provided with an ionized gas outlet and an air inlet, wherein the air inlet is connected with the air pumping piece 120 and is used for receiving air conveyed by the air pumping piece 120, the ionized gas outlet is used for releasing ionized air plasma, when the insulating medium container is applied, the ionized gas outlet is inserted into the solution A to be treated, and the air plasma is directly conveyed into the solution A to be treated. The electrode 160 is specifically a metal electrode, for example, may be a metal high-voltage rod electrode, and the metal high-voltage rod electrode may be a corrosion-resistant and ablation-resistant metal rod such as a stainless steel rod or a tungsten rod; the electrode 160 is inserted into the insulating medium container 140, when high voltage is applied to the electrode, a high voltage ionization phenomenon occurs in the insulating medium container 140, an air gap between the electrode and the inner wall of the insulating medium container 140 breaks down to generate air plasma, O 3, NO and NO 2 are generated at the same time during discharging, the air plasma enters into the solution A to be treated under the action of air flow, and H +、NO2 - and NO 3 - are generated in the solution A to be treated by the air plasma.
Further, the gas phase discharge assembly 100 further includes a first driving power source 170, and the first driving power source 170 is connected to the electrode 160. The first driving power source 170 is used to apply high voltage to the electrodes, and specifically, the first driving power source 170 is an ac high voltage power source or a pulsed dc high voltage power source with an output frequency ranging from kHZ to several tens of kHZ and an output voltage amplitude ranging from several kV to several tens of kV. In practice, the choice of the output voltage of the first drive power supply 170 is related to the width of the air gap between the electrode 160 and the dielectric container 140, which needs to be chosen to meet the voltage required to break down the air gap. The gap is generally about a few millimeters, and the larger the gap, the higher the voltage required to initiate discharge.
In one application example, the air pumping member 120 is an air pump, the insulating medium container 140 is a medium tube made of insulating materials such as quartz glass or ceramic, the electrode is a high-voltage rod electrode, and the air pump sucks ambient air into the medium tube and then introduces the ambient air into the solution to be treated a through the ionized gas outlet. The high-voltage rod electrode is connected to the high-voltage output end of the first driving power supply 170, and when a high-voltage alternating current or a high-voltage pulse is applied to the high-voltage rod electrode, an annular air gap between the high-voltage rod electrode and the medium tube breaks down to generate air plasma, and O 3, NO and NO 2 generated during discharge enter the solution A to be treated under the action of air flow to generate H +、NO2 - and NO 3 - in water.
As shown in fig. 2, in one embodiment, the gas phase discharge assembly 100 further includes a first porous bubble member 180, and the first porous bubble member 180 is disposed at the ionized gas outlet of the insulating medium container 140.
The first porous bubble member 180 is used to increase the contact area of air with the solution a to be treated, so as to accelerate and enhance the dissolution of the plasma gas in the solution a to be treated. Specifically, when the gas (including plasma) is emitted through the porous bubble member, a large number of bubbles are formed, and the gas in these bubbles is sufficiently brought into contact with and dissolved in the solution a to be treated. The first porous bubble member 180 may be specifically a bubble stone.
As shown in fig. 2, in one embodiment, the gas-liquid mixed phase discharge assembly 200 includes an insulator 220 and an electrode array 240, the electrode array 240 is disposed on the insulator 220, and the electrode array 240 is ionized at a gas-liquid interface.
The insulator 220 is used to achieve high voltage electrical insulation, avoiding accidents. The electrode array 240 is used for ionizing the gas-liquid interface under the high-voltage environment, the electrode array 240 can be specifically a metal needle electrode array, high-voltage is applied to the metal needle electrode array 240, air plasma is generated in the area (gas-liquid interface area) between the needle point of the metal needle electrode array and the liquid surface of the solution A to be treated, and a large amount of H 2O2 can be generated in the liquid of the gas-liquid interface at the same time when the discharge. Further, the electrode array 240 may be fixed to the insulator 220.
As shown in fig. 2, in one embodiment, the gas-liquid mixed phase discharge assembly 200 further includes a second driving power supply 280, the second driving power supply 280 being connected to the electrode array 240. The second driving power supply 280 is used to apply high voltage to the electrode array 240, and specifically, the second driving power supply 280 is an ac high voltage power supply or a pulsed dc high voltage power supply with an output frequency ranging from kHZ to several tens of kHZ and an output voltage amplitude ranging from several kV to several tens of kV.
As shown in fig. 3, in one embodiment, the gas-liquid mixed phase discharge assembly 200 includes a pumping member 250, a gas-liquid mixed phase ionization tank 260, and a high voltage electrode 270; the water inlet of the water pumping piece 250 is connected with the container 300, the water outlet of the water pumping assembly is connected with the gas-liquid mixed phase ionization groove 260, and the gas-liquid mixed phase ionization groove 260 is provided with a water outlet; the pumping assembly pumps the solution A to be treated in the container 300 to the gas-liquid mixed phase ionization tank 260, the high-voltage electrode 270 and the solution A to be treated in the gas-liquid mixed phase ionization tank 260 form a gas-liquid interface, the high-voltage electrode 270 ionizes at the gas-liquid interface, and the ionized solution flows back to the container 300 through the water outlet of the gas-liquid mixed phase ionization tank 260.
In this embodiment, the gas-liquid mixed phase discharging assembly 200 adopts another structure, which specifically includes a pumping member 250, a gas-liquid mixed phase ionization tank 260 and a high-voltage electrode 270, the pumping member 250 is used for pumping the solution a to be treated in the container 300 into the gas-liquid mixed phase ionization tank 260, the high-voltage electrode 270 and the solution a to be treated in the gas-liquid mixed phase ionization tank 260 form a gas-liquid interface, the high-voltage electrode 270 ionizes on the gas-liquid interface under a high-voltage environment to generate gas plasma, and a large amount of H 2O2 is generated in the liquid of the gas-liquid interface during discharging, and the ionized solution flows back to the container 300 through the water outlet of the gas-liquid mixed phase ionization tank 260. Specifically, the pumping member 250 may be a water pump, the gas-liquid mixed phase ionization tank 260 may be a water tank with a water outlet at the bottom far from the water inlet, the high-voltage electrode 270 may be a high-voltage rod electrode wrapped by an insulating medium, the water pump is electrified and started to pump the solution a to be treated in the container 300 into the water tank, the water inflow is controlled to ensure that the distance between the page and the lower edge of the high-voltage rod electrode is within a range of several millimeters, after a proper voltage is applied to the high-voltage rod electrode, air plasma is generated at the water tank liquid level (gas-liquid interface), a large amount of H 2O2 is generated in the water tank liquid level, and the ionized solution is discharged into the container 300 through the water outlet.
As shown in fig. 2, in one embodiment, the plasma activated water preparation apparatus further includes a container cover 400, a vent pipe 500, and a baffle member 600, wherein the container cover 400 is provided with a first air outlet and a second air outlet, one end of the baffle member 600 is connected to the container cover 400, the other end of the baffle member 600 is inserted into the container 300 and is in contact with the solution a to be treated, the first air outlet and the second air outlet are respectively disposed at two sides of the baffle member 600, the first air outlet is located at a side close to the gas-liquid mixed phase discharge assembly 200, and the second air outlet is located at a side far away from the gas-liquid mixed phase discharge assembly 200; one end of the vent pipe 500 is connected with the first air outlet, and the other end of the vent pipe 500 is inserted into the solution A to be treated.
The container cover 400 is a cover disposed at an upper end of the container 300, and forms a relatively sealed environment with the container 300, so as to retain air plasma generated by ionization in the container 300, thereby increasing contact time and dissolution time of the air plasma with the solution A to be treated, and further improving the preparation efficiency of activated water. The vent pipe 500 is a circuit for forming a "reflux" to re-reflux the ionized air plasma into the solution a to be treated in the container 300 for secondary dissolution. The baffle member 600 is used to block the air plasma generated by ionization from being directly "discharged" to the atmosphere through the second air outlet, one end of the baffle member 600 is connected to the container cover 400, specifically may be fixedly connected, and the other end of the baffle member 600 is inserted (immersed) into the solution a to be treated (specifically may be at a position 1-2 cm away from the bottom of the container 300), so that part of the air (including a large amount of air plasma) on the container 300 is blocked from being directly "discharged" to the atmosphere through the second air outlet. Further, a second porous bubble member 700 is further disposed at one end of the breather pipe 500 inserted into the solution a to be treated, and the second porous bubble member 700 has a similar structure to the first porous bubble member in function, and may be a bubble stone as well, which is not described herein.
In practical application, in the discharging process, gas introduced into the solution A to be treated and gas generated above the liquid level enter the bubble stone again through the first gas outlet, the pipeline and the second gas outlet for secondary dissolution, and finally the second gas outlet is discharged to the external environment. The baffle in the container 300 is used for reducing the direct discharge of the gas introduced into the solution to be treated a by the gas pump in the second gas outlet.
In order to describe the technical scheme of the plasma activated water preparation device of the present application in detail, the composition of the whole device and its working functions will be described in detail below using specific application examples.
As shown in fig. 4, the plasma activated water preparation device of the application comprises a first driving power supply 1, a second driving power supply 2, an air pump 3, a medium pipe 4, a high-voltage rod electrode 5, a bubble disk 10, a medium-wrapped ground electrode 17, a container 13, a solution 14 to be treated, a high-voltage insulating plate 6, a metal needle electrode array 7, a vent pipe, a baffle 12, a bubble stone 11, a container cover, and a first air outlet 8 and a second air outlet 9 which are arranged on the container cover, wherein the first air outlet 8 is close to a gas-liquid mixed phase discharge assembly, and the solution 14 to be treated is an aqueous solution. The whole working process is as follows:
The air pump 3 sucks ambient air into the medium pipe 4 and then passes through the bubble tray 10 to the solution 14 to be treated. The high-voltage rod electrode 5 is connected with the high-voltage output end of the first driving power supply 1, when a high-voltage alternating current or a high-voltage pulse is applied to the high-voltage rod electrode 5, an annular air gap between the high-voltage rod electrode 5 and the medium tube 4 is broken down to generate a first part of air plasma 15, and O 3, NO and NO 2 which are generated by discharging simultaneously enter an aqueous solution through the bubble tray 10 under the action of air flow, so that H+, NO 2-and NO 3-are generated in water. Preferably, the first driving power source 1 outputs an ac high voltage power source or a pulsed dc high voltage power source with a frequency in the range of kHZ to several tens of kHZ and an output voltage with an amplitude in the range of several kV to several tens of kV; preferably, the medium tube 4 is a quartz glass tube or a ceramic tube; preferably, the high-voltage rod electrode 5 is a corrosion-resistant and ablation-resistant metal rod such as a stainless steel rod and a tungsten rod; the second driving power supply 2, the high-voltage insulating plate 6, the metal needle electrode array 7 and the medium-wrapped ground electrode 17 jointly form a gas-liquid mixed phase discharge system. Specifically, the high voltage output end of the second driving power supply 2 is connected with the metal needle electrode array 7, the metal needle electrode array 7 is fixed on the upper cover plate of the water tank through the high voltage insulating plate 6, when a high enough voltage is applied to the metal needle electrode array 7, a second part of air plasma 16 is generated in the area between the needle point and the liquid level, and a large amount of H 2O2 is generated in the liquid at the gas-liquid interface during discharge. In the discharging process, the gas introduced into the aqueous solution and the gas generated above the liquid level can enter the bubble stone 11 again through the first gas outlet 8 by the pipeline for secondary dissolution, and finally the second gas outlet 9 is discharged to the external environment. The baffle 12 in the water tank is used for reducing the direct discharge of the air in the aqueous solution fed by the air pump 3 from the second air outlet 9.
As shown in fig. 5, the plasma activated water preparation device of the application comprises a first driving power supply 1, a second driving power supply 2, an air pump 3, a medium pipe 4, a high-voltage rod electrode 5, a bubble disk 10, a medium-coated ground electrode 17, a container 13, a solution 14 to be treated, a pumping piece 18, a gas-liquid mixed phase ionization groove 19, a high-voltage rod electrode 20 coated by an insulating medium 21, a vent pipe, a baffle 12, a bubble stone 11, a container cover and a second air outlet 9 which are arranged on the container cover, wherein the first air outlet 8 is close to a gas-liquid mixed phase discharge assembly, and the solution 14 to be treated is an aqueous solution. The whole working process is as follows:
The air pump 3 sucks ambient air into the medium pipe 4 and then passes through the bubble tray 10 to the solution 14 to be treated. The high-voltage rod electrode 5 is connected with the high-voltage output end of the first driving power supply 1, when a high-voltage alternating current high voltage or a pulse direct current high voltage is applied to the high-voltage rod electrode 5, an annular air gap between the high-voltage rod electrode 5 and the medium pipe 4 is broken down to generate air plasma, and O 3, NO and NO 2 generated during discharging enter aqueous solution through the bubble tray 10 under the action of air flow to generate H+, NO 2-and NO 3-in water. Preferably, the first driving power source 1 outputs an ac high voltage power source or a pulsed dc high voltage power source with a frequency in the range of kHZ to several tens of kHZ and an output voltage with an amplitude in the range of several kV to several tens of kV; preferably, the medium tube 4 is a quartz glass tube or a ceramic tube; preferably, the high-voltage rod electrode 5 is a corrosion-resistant and ablation-resistant metal rod such as a stainless steel rod and a tungsten rod; the second driving power supply 2, the high-voltage insulating plate 6, the metal needle electrode array 7 and the medium-wrapped ground electrode 17 jointly form a gas-liquid mixed phase discharge system. Specifically, the high-voltage output end of the second driving power supply 2 is connected with a high-voltage rod electrode 20 wrapped by an insulating medium 32, the water pump 18 starts to extract the high-voltage rod electrode 20 wrapped by the insulating medium 21 from the container 13 in the gas-liquid mixed-phase ionization tank 19 above the water solution level, the high-voltage rod electrode 20 wrapped by the insulating medium 21 is fixed above the gas-liquid mixed-phase ionization tank 19, the water inflow is controlled to ensure that the distance between the liquid level and the lower edge of the high-voltage rod electrode 20 is within a range of a few millimeters, after a proper voltage is applied, a second part of air plasma 16 is generated above the water tank level, and the discharged liquid flows back into the container 13 below. In the discharging process, the gas introduced into the aqueous solution and the gas generated above the liquid level can enter the bubble stone 11 again through the first gas outlet 8 by the pipeline for secondary dissolution, and finally the second gas outlet 9 is discharged to the external environment. The baffle 12 in the water tank is used for reducing the direct discharge of the air in the aqueous solution fed by the air pump 3 from the second air outlet 9.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
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| CN115594257A (en) * | 2022-10-24 | 2023-01-13 | 山东大学（Cn） | Discharge nitrogen fixation device and method |
| CN115636473B (en) * | 2022-11-02 | 2025-02-18 | 山东大学 | Water treatment device and method based on plasma |
| CN116040749A (en) * | 2022-11-03 | 2023-05-02 | 山东大学 | DBD reaction device, equipment and method for preparing low-temperature plasma activated water |
| CN115870105A (en) * | 2023-02-21 | 2023-03-31 | 中国矿业大学 | Device for preparing cold-state active oil bubbles by using low-temperature plasma and flotation method |
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